Owner's Manual
That’s better. That’s Actron.
Cascade Series 2
Four Way Cassette
IMPORTANT NOTE:
Please read this manual carefully before installing or operating your air conditioning unit. Make sure to save this manual for
future reference.
CAUTION:
The system is charged with fl ammable refrigerant, safety checks are necessary to ensure that the
risk of ignition is minimised.
Model Numbers
CRC-100CS / CRE-100CS
URC-125CS / CRE-125CS
URC-140CS / CRE-140CS
Owner's Manual - Cascade Series 2
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Table of Contents
. General Information .............................................................................................................
. Safety Instructions ...............................................................................................................
. Unit Parts .............................................................................................................................
. Operating Conditions ...........................................................................................................
. Features ...............................................................................................................................
. Care and Maintenance ..........................................................................................................
. Troubleshooting ................................................................................................................
. Display / Error Codes ..........................................................................................................
. Maintenance ......................................................................................................................
. Maintenance Frequency Checklist ......................................................................................
READ SAFETY PRECAUTIONS
Incorrect system operations due to ignoring instructions can cause serious damage or injury. The
seriousness of potential damage or injuries is classified as either a WARNING or CAUTION.
Failure to observe a warning may result in death or serious injury.
CAUTION
Failure to observe a caution may result in injury or equipment damage.
This manual is a controlled document which contains confidential and proprietary information.
Distribution, modification, copying and/or reproduction are prohibited without written consent from ActronAir
Product design and specifications are subject to change without prior notice for product improvement.
Drawings are for illustration purposes only and may vary depending on the model purchased.
WARNING
Owner's Manual Four-Way Cassette
Owner's Manual - Cascade Series 2
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. General Information
CONGRATULATIONS on your purchase of an ActronAir air conditioning unit! This unit has been designed and engineered
to provide optimum air conditioning and to achieve maximum energy efficiency.
Your air conditioning system has been manufactured from the highest quality materials. Numerous “in house” and
“external” inspections and test procedures were conducted to your air conditioning unit to ensure satisfactory operation.
This guide provides operation instructions specific to your split indoor unit. Read this manual thoroughly to ensure safe
operation of your air conditioning system.
. Safety Instructions
•Only licensed HVAC technicians* should service this air conditioning equipment. Improper service or alteration by
an unqualified technician could result in significant and major damage to the product or property which may render
your warranty null and void. Such unqualified service could also lead to severe physical injury or death. Follow all safety
instructions in this literature and all warning labels that are attached to the equipment.
•Prevailing WH&S regulations must be observed and will take precedence to the safety instructions contained on this
manual. Safe work practices and environment must be the paramount importance in the performance of all the service
procedures.
•This appliance is not intended for use by young children or infirm persons unless they have been adequately supervised
by a responsible person to ensure that they can use the appliance safely. Young children should be supervised to ensure
that they do not play with the appliance.
*Qualifications required will be appropriate Electrical, Refrigeration and Refrigerant Handling License and Training
dependent on local State/Territory regulations.
DANGER
Hazardous Voltage - Risk of Electrocution.
Turn Off the power from main isolator before proceeding with any service and maintenance work of the unit. Observe proper
LOCK-OUT/TAG-OUT (LOTO) procedures for electrical appliances in order to prevent accidental switching-on of the power
supply. Extreme care and caution must be observed should there be a need to work on live circuit.
WARNING
• If any abnormal situation arises (like burning smell), turn of the power supply and call your HVAC technician for instructions
to avoid electric shock, fire or injury.
• DO NOT let the indoor unit or the controller get wet. It may cause electric shock or fire.
• DO NOT insert fingers, rods or other objects into the air inlet or outlet. This may cause injury, since the fan may be rotating
at high speeds.
• DO NOT use a flammable spray such as hair spray, lacquer or paint near the unit. This may cause fire or combustion.
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CAUTION
• DO NOT inspect the unit by yourself. Ask a qualifi ed HVAC technician to perform the inspection.
• To prevent product deterioration, do not use the air conditioner for preservation purposes (storage of food, plants, animals,
works of art, etc.).
• DO NOT touch the evaporator coils inside the indoor unit. The evaporator coils are sharp and may cause injury.
• DO NOT place items that might be aff ected by moisture damage under the indoor unit. Condensation can occur at a relative
humidity of 80%.
• DO NOT expose heat-producing appliances to cold air or place them under the indoor unit. This may cause incomplete
combustion or deformation of the unit due to the heat.
• If the air conditioner is used together with other heating devices, thoroughly ventilate the room to avoid oxygen defi ciency.
• DO NOT climb onto or place objects on top of the outdoor unit.
• DO NOT operate the air conditioner when using fumigant insecticides. The chemicals may become layered with the unit and
endanger those who are hypersensitive to chemicals.
• DO NOT let children play with the air conditioner.
• DO NOT attempt to manually adjust or bend louvre blades. Doing so may damage louvre blades, or if pushed closed may cause
excess condensation resulting in the failure of the air conditioning.
DANGER
• DO NOT operate the air conditioner in a wet room (e.g. bathroom or laundry room) nor with wet hands. This can cause electrical
shock and cause the product to deteriorate.
WARNING
This air-conditioning unit contains R-32 refrigerant (CLASS A2L) which is mildly fl ammable.
NOTE
• Service, maintenance, repairs and decommissioning of this unit must be performed by a licensed HVAC technician; qualifi ed
to handle R-32 refrigerant.
• R-32 refrigerant is odourless, if the refrigerant gas comes into contact with fi re, it may emit a poisonous gas.
• Do not continuously operate open fl ames and ignition sources in the room.
. Unit Parts
Operation
indicator
Timer
indicator
PRE-DEF indicator
(pre-heating/defrost)
Alarm indicator
Air inlet
Air outlet
Louver
When wireless control
feature is activated
LED display
Display panel
Display panel
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. Operating Conditions
Operating Temperature
Optimal performance for the COOL, HEAT, and DRY modes can be achieved in the following temperature ranges. When
your air conditioner is used outside of these ranges, certain safety protection features will activate and cause the unit to
perform less than optimally.
COOL Mode HEAT Mode DRY Mode
Room Temperature 16°C to 32°C 0°C to 30°C 10°C to 32°C
Outdoor Temperature 0°C to 50°C -20°C to 24°C 0°C to 50°C
NOTE
Room relative humidity should be less than 80%. If the air conditioner operates in room with relative humidity greater than
80%, the surface of the air conditioner may attract condensation. To avoid condenstion on louvers, please set the vertical air
flow louvre to its maximum angle and set HIGH fan mode.
To further optimize the performance of your unit, do the following:
•Keep doors and windows closed.
•Limit energy usage by using TIMER ON and TIMER OFF functions.
•Do not block air inlets or outlets.
•Regularly inspect and clean air filters.
. Features
Compressor Protection
•The compressor cannot restart for 3 minutes after it stops.
Hot Start
•The unit is designed to minimise cold air during HEAT mode, when the indoor heat exchanger is in one of the following
conditions and the set temperature has not been reached.
a. When heating has just started.
b. When the system is in defrost.
c. Low temperature heating.
Defrosting
•Frosting may occur on the outdoor unit during a heat cycle when outdoor temperature is low and humidity is high
resulting in lower heating efficiency.
•Under these conditions, the air conditioner will stop heating operations and start defrosting automatically.
•The defrost period may vary from 4 to 10 minutes, depending on the outdoor temperature and the amount of frost
buildup on the outdoor unit.
•The indoor and outdoor fan stop running when the system is in defrost.
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Auto-Restart
The system has an auto restart function. If a power failure occurs, the system will immediately stop. When power returns,
the unit will restart automatically in its last programmed setting once power is resotered.
Louvre Angle Memory Function
When the unit restarts after a power failure, the angle of the horizontal louvres will automatically return to the previous
position. The angle of the horizontal louvre should not be set to small opening (or near close possition) as condensation
may form and drip from the machine.
NOTE
Lightning or any electronic interference nearby may cause the unit to malfunction. If this happens, reset the power mains
(isolator). Press the ON/OFF button on the wired controller to restart operation.
Optimal Operation
To achieve optimal performance, please note the following:
•Adjust the direction of the air flow so that it is not blowing directly onto people.
•Adjust the temperature to achieve the highest possible level of comfort. DO NOT adjust the unit to excessive
temperature levels.
•While cooling, close the blinds or curtains to avoid direct sunlight.
•Doors and windows should be kept closed to keep cool or warm air in the room.
•Set an ON/OFF TIMER and use SLEEP/ECONOMY feature.
•Do not place any object near the air inlet or air outlet, as the efficiency of the air conditioner may be reduced and the
air conditioner may stop running.
•When a remote control is used, remove the batteries if you don’t plan to use the unit for a long time.
•Clean the air filter periodically, otherwise cooling or heating performance may be reduced.
. Care and Maintenance
NOTES
Apart from Cleaning the Air Filter, all other general maintenance and care of systems should be undertaken by a licensed
technician.
Service, maintenance, repairs and decommissioning of this unit must be performed by a licensed HVAC technician; qualified
to handle R-32 refrigerant.
Maintenance Procedures
This section describes the procedures that must be performed as a part of normal maintenance program. Regular
servicing of equipment by a licensed technician is highly recommended. Regular servicing of your unit helps in
maintaining its optimum performance and reliability. The checklist and service periods provided in this manual are
guides only, as some sites may require more frequent servicing. Always disconnect electrical power to the unit before
performing these procedures. It is always a safe practice to observe all safety warnings and cautions when conducting
maintenance tasks.
WARNING
Hazardous Voltage !
Always make sure that all power supply, including remote controls, are disconnected before performing maintenance.
Observe proper LOCK-OUT/TAG-OUT procedures to ensure that power cannot be inadvertently energised. Failure to
disconnect power before maintenance procedures can result in serious injury and/or death.
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DANGER
Live Electrical Connections!
It may be necessary to work with live electrical components on certain maintenance tasks. Only licensed electricians and
qualified technicians are allowed to perform these tasks.
Beware of Rotating Fan Blades!
Always make sure that all power supply, to the Outdoor Fans are turn Off and isolated.
Observe WH&S safety procedures, do not wear loose clothing and any jewellery when working near the fans.
Wear PPE whenever performing any maintenance procedures.
Observe all necessary procedures when working in a confined space.
Annual Maintenance Checklists
•Perform general maintenance inspections.
•Perform scheduled start-up checks.
•Leak test refrigerant circuits.
•Inspect contacts of all contactors and relays. Replace all worn contacts as required.
•Inspect, clean and tighten all electrical connections.
•Check fans for balanced operation. Make sure that there are no loose screws / bolts, no fan blades interference and no
damage to the fans and guards.
•Inspect the air filters, clean or replace as required.
•Clean and repaint any corroded panel section.
•Ensure no blockage of airflow through variable speed drive.
Cleaning the Condenser Coils
Clean the coils at least once a year or more frequently if unit is located in a dusty and dirty environment, in order to
maintain your system’s proper operating performance. High discharge pressures are good indication that the coils need
cleaning. When using detergent or solvents to clean the coils, follow the manufacturer’s instructions to avoid potential
damage to the coils and to the unit.
To clean the refrigerant coils, use a soft brush and water spray, such as garden hose or pressure washer with low pressure
nozzle.
WARNING
Do Not Use High Alkaline Detergent!
When using detergent for coil cleaning, ensure that the alkaline level is no higher than 8.5, which can cause corrosion damage
to the coils.
No Water into the Electrical Compartments!
Ensure consideration is given to the possibility of water entering the electrical compartments during cleaning of the
condenser coil.
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Coil Cleaning Procedures
•Disconnect power to the unit.
•Remove the louvered panels from the unit to gain access to the air inlet side of the coils.
•Use a soft brush to remove loose dirt and debris from both sides of the coils.
•Straighten bent coil fi ns with fi n comb.
•Prepare the detergent solutions according to the manufacturer’s instructions.
•Spray solution at a 90o angle to the coils, keeping a minimum nozzle spray angle of 15°, with at least a 1800mm distance
from the coils and 600 psi pressure.
•Spray leaving air side of the coils fi rst then the air inlet side. Allow the solution to stand on the coils for fi ve minutes.
•Rinse both sides of the coils with cool clean water.
•Inspect the coils, if they are still dirty, repeat the cleaning procedure.
•Clean and wipe dry the outer and inner sides of the unit, the refrigerating parts and other components.
•Ensure that the condensate drain lines are not blocked.
•Reinstall all unit panels, covers and guards.
•Restore electrical power to the unit after ensuring all electrical components are dry.
How To Clean Air Filter
The fi lter prevents dust and other particles from entering the indoor unit. Dust build up can reduce the effi ciency of the air
conditioner. For optimum effi ciency, clean the air fi lter regularly or more frequently if unit is installed in a dusty area.
WARNING
1. Ensure the unit is OFF before checking or cleaning the air fi lter.
2.To avoid injury, ensure that the blower fan comes to a complete stop before removing the air fi lter.
3. Air inlet frame may swing down when unlocked. Ensure to guide the air inlet frame to complete open position (do not let it
swing freely).
Step 1. Unlock the grille by pushing the two tabs towards the middle simultaneously.
Push tabs sideways to
release grille
Step 2. Remove the fi lter from the grille.
(Be mindful of the cable from the control box on the main body to the display panel.)
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Step 3. Remove the air fi lter.
Step 4. Clean the air fi lter by vacuuming the surface or washing it with warm and mild detergent.
Step 5. Rinse the fi lter with clean water and allow it to air-dry. DO NOT let the fi lter dry in direct sunlight.
Step 6. Reinstall the fi lter.
Step 7. Ensure the cable from the display panel to the control box is not loose and not obstructing the grill.
Step 8. Lock the grille by sliding the two tabs outwards simulataneously.
Preparation For Periods of Non-Use
If you plan to not use your air conditioner for an extended period of time, do the following:
•Run the appliance on FAN mode for 12 hours in a warm room to dry all its components. Presence of moisture for a long
period of time may lead to mold formation.
•Turn off the appliance and turn off power via the main power isolator.
•Clean the air fi lter according to the instructions in the previous section. Reinstall the clean, dry fi lter before storing.
•Remove the batteries from the remote control (if remote control is used).
Maintenance – Pre-Season Inspection
After long periods of non-use, or before periods of frequent use, do the following:
•Use a dry cloth to wipe off the dust accumulated on the rear air intake grille in order to avoid the dust being dispersed
from the indoor unit.
•Check that the air fi lter is installed.
•Check if the air outlet or inlet is blocked after the air conditioner has not been used for a long time.
•Turn on the main power isolator at least 12 hours prior to operating the unit.
CAUTION
• Any unit repairs, maintenance and cleaning of outdoor unit should be performed by qualifi ed HVAC technician.
• Filter cleaning can and should be regularly performed by product owner as required.
WARNING
• If the refrigerant leaks, turn off the air conditioner and any combustible heating devices, ventilate the room and call your
HVAC technician immediately. Refrigerant can be toxic. DO NOT use the air conditioner until the leak is repaired.
• When the air conditioner is installed in a small room, measures must be taken to prevent the refrigerant concentration
from exceeding the safety limit in the event of refrigerant leakage. Concentrated refrigerant causes a severe health and
safety threat.
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. Troubleshooting
SAFETY PRECAUTIONS
If ANY of the following conditions occurs, turn off your unit immediately!
• Any cables are damaged or abnormally warm
• You smell a burning odour
• The unit emits loud or abnormal sounds
• A power fuse blows or the circuit breaker frequently trips
• Water or other objects fall into or out of the unit
DO NOT ATTEMPT TO FIX THESE YOURSELF! CONTACT AUTHORISED SERVICE PROVIDER IMMEDIATELY!
The following problems are not a malfunction and in most situations will not require repairs.
Fault Possible Causes
Unit does not turn on
when pressing ON/OFF
button
The unit has a 3-minute protection feature that prevents the unit from overloading. The unit
cannot be restarted within three minutes of being turned off.
If the Operation light and PRE-DEF (Pre-heating/ Defrost) indicators are lit up, the outdoor
temperature is too cold and the unit’s hot start feature is activated in order to defrost the unit.
The unit changes from
COOL mode to FAN mode
The unit changes its setting to prevent frost from forming on the unit. Once the temperature
increases, the unit will start operating again.
The set temperature has been reached, at which point the unit turns off the compressor. The unit
will resume operating when the temperature fluctuates again.
The indoor unit emits
white mist
In humid regions, a large temperature difference between the room’s air and the conditioned air
can cause white mist.
Both the indoor and
outdoor units emit white
mist
When the unit restarts in HEAT mode after defrosting, white mist may be emitted due to moisture
generated from the defrosting process.
The indoor unit makes
noises
A squeaking sound is heard when the system is OFF or in COOL mode. The noise is also heard
when the drain pump (optional) is in operation.
A squeaking sound may occur after running the unit in HEAT mode due to expansion and
contraction of the unit’s plastic parts.
Both the indoor unit and
outdoor unit make noises
A low hissing sound may occur during operation. This is normal and is caused by refrigerant gas
flowing through both the indoor and outdoor units.
A low hissing sound may be heard when the system starts, has just stopped running or is
defrosting. This noise is normal and is caused by the refrigerant gas stopping or changing
direction.
The outdoor unit makes
noises The unit will make different sounds based on its current operating mode.
Dust is emitted from
either the indoor or
outdoor unit
The unit may accumulate dust during extended periods of non-use, which will be emitted when
the unit is turned on. This can be mitigated by covering the unit during long periods of inactivity.
The indoor unit emits a
bad odour
The unit may absorb odors from the environment (such as furniture, cooking, cigarettes, etc.)
which will be emitted during operations.
The unit’s filters have become moldy and should be cleaned.
The fan of the outdoor
unit does not operate During operation, the fan speed is controlled to optimize product operation.
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When troubles occur, please check the following points before contacting a HVAC service repair company.
Fault Possible Causes Remedies
The unit is not working
Power failure Wait for the power to be restored
The power switch is off Turn on the power
Remote control batteries are dead Replace the remote control batteries
The unit’s 3-minute protection has been
activated Wait three minutes after restarting the unit
Poor Cooling / Heating
Performance
Temperature setting may be higher than
the ambient room temperature for the
cooling mode; or lower than the ambient
temperature for the heating mode
Adjust to temperature setting higher / lower
The heat exchanger on the indoor or
outdoor unit is dirty Clean the affected heat exchanger
The air filter is dirty Remove the filter and clean it according to
instructions
The air inlet or outlet of either unit is
blocked
Turn the unit off, remove the obstruction and
turn it back on
Doors and windows are open Make sure that all doors and windows are
closed while operating the unit
Excessive heat is generated by sunlight
(Cooling only)
Close windows and curtains during periods of
high heat or bright sunshine
The unit starts and stops
frequently
Setpoint is reached Check that the setpoint is not reached
Unit encounters an error Check that the unit does not display any error
NOTE
If your problem persists after performing the checks and diagnostics above, turn off your unit immediately and contact
ActronAir on 1800 119 229 for technical support or warranty.
. Display / Error Codes
When troubles occur, please check the following points before contacting a qualified service technician.
Normal Display (not error code)
Display
Codes
Operation
Lamp Timer Lamp Causes
dF - - Defrost
CL - - Filter cleaning reminder (power on display for 15 seconds)
CL - - Active clean
nF - - Filter replacement reminder (power on display for 15 seconds)
FP - - Heating in room temperature under 8°C
FC - - Forced cooling
AP - - AP mode of WIFI connection
CP - - Remote switched off
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. Maintenance
Maintenance Procedures
This section describes the procedures that must be performed as a part of normal maintenance program. Regular This section describes the procedures that must be performed as a part of normal maintenance program. Regular
servicing of equipment by licensed HVAC technician is highly recommended. Always disconnect electrical power to the servicing of equipment by licensed HVAC technician is highly recommended. Always disconnect electrical power to the
unit before performing these procedures. It is always a safe practice to observe all safety warnings and cautions when unit before performing these procedures. It is always a safe practice to observe all safety warnings and cautions when
conducting maintenance tasks. conducting maintenance tasks.
DANGER
Live Electrical Connections !
It may be necessary to work with live electrical components on certain maintenance tasks. Only licensed electricians and
qualified technicians are allowed to perform these tasks.
WARNING
Hazardous Voltage !
Always make sure that all power supply, including remote controls, are disconnected before performing maintenance.
Observe proper LOCK-OUT / TAG-OUT (LOTO) procedures to ensure that power cannot be inadvertently energised. Failure to
disconnect power before maintenance procedures can result in serious injury and/or death.
Error Codes
Error
Codes
Operation
Lamp Timer Lamp Causes
EH 00/
EH 0A 1 time X Indoor unit EEPROM parameter error
EL 01 2 times X Indoor / outdoor unit communication error
EH 03 4 times X The indoor fan speed is operating outside of the normal range
EH 60 6 times X Indoor room temperature sensor T1 is in open circuit or has short circuited
EH 61 6 times X Evaporator coil temperature sensor T2 is in open circuit or has short circuited
EL 0C 8 times X Refrigerant Leakage Detection
EH 0b 9 times X Communication error between indoor two chips
EH 0E 13 times X Water-level alarm malfunction
EC 53 5 times X Outdoor room temperature sensor T4 is in open circuit or has short circuited
EC 52 5 times X Condenser coil temperature sensor T3 is in open circuit or has short circuited
EC 54 5 times X Compressor discharge temperature sensor TP is in open circuit or has short circuited
EC 56 5 times X Evaporator coil outlet temperature sensor T2B is in open circuit or has short circuited
EC 51 5 times O Outdoor unit EEPROM parameter error
EC 07 12 times X The outdoor fan speed is operating outside of the normal range
PC 00 7 times IPM malfunction or IGBT over-strong current protection
PC 01 2 times Over voltage or over low voltage protection
PC 02 3 times Top temperature protection of compressor or High temperature protection of IPM module
PC 04 5 times Inverter compressor drive error
PC 03 7 times High pressure protection or low pressure protection
EC 0d 14 times X Outdoor unit malfunction
EH bA -- -- Communication malfunction between external fan module and indoor unit
EH 3A 4 times X External fan DC bus voltage is too low protection
EH 3b 4 times X External fan DC bus voltage is too high fault
-- 1 time O Indoor units mode conflict (match with multi outdoor unit)
O - ON / X - OFF / - FLASH
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Annual Maintenance Checklists
•Perform general maintenance inspections.
•Perform scheduled start-up checks.
•Leak test refrigerant circuits.
•Inspect contacts of all contactors and relays. Replace all worn contacts as required.
•Inspect, clean and tighten all electrical connections.
•Check fans for balanced operation. Make sure that there are no loose screws / bolts, no fan blades interference and no
damage to the fans and guards.
•Inspect the air filters, clean or replace as required.
•Clean and repaint any corroded panel section.
•Ensure no blockage of airflow through variable speed drive and drive fan is operating correctly.
Cleaning the Condenser Coils
Clean the coils at least once a year or more frequently if unit is located in a dusty and dirty environment, in order to
maintain your system’s proper operating performance. High discharge pressures are good indication that the coils need
cleaning. When using detergent or solvents to clean the coils, follow the manufacturer’s instructions to avoid potential
damage to the coils and to the unit.
To clean the refrigerant coils, use a soft brush and water spray, such as garden hose or pressure washer with low pressure To clean the refrigerant coils, use a soft brush and water spray, such as garden hose or pressure washer with low pressure
nozzle. nozzle.
DANGER
Beware of Rotating Fan Blades !
• Always make sure that all power supply, to the Outdoor Fans are turned-off and isolated.
• Observe WH&S safety procedures, do not wear loose clothing and any jewellery when working near the fans.
• Wear PPE whenever performing any maintenance procedures.
• Observe all necessary procedures when working on a confined space.
CAUTION
Do Not Use High Alkaline Detergent !
When using detergent for coil cleaning, ensure that the alkaline level is no higher than 8.5, which can cause corrosion damage to
the coils.
Coil Cleaning Procedures
•Disconnect power to the unit.
•Remove the louvered panels from the unit to gain access to the air inlet side of the coils.
•Use a soft brush to remove loose dirt and debris from both sides of the coils.
•Straighten bent coil fins with fin comb.
•Prepare the detergent solutions according to the manufacturer’s instructions.
•Spray solution at a 90o angle to the coils, keeping a minimum nozzle spray angle of 15o, with at least a 1800mm distance
from the coils and 600 psi pressure.
•Spray leaving air side of the coils first then the air inlet side. Allow the solution to stand on the coils for five minutes.
•Rinse both sides of the coils with cool clean water.
•Inspect the coils, if they are still dirty, repeat the cleaning procedure.
•Clean and wipe dry the outer and inner sides of the unit, the refrigerating parts and other components.
•Ensure that the condensate drain lines are not blocked.
•Reinstall all unit panels, covers and guards.
•Restore electrical power to the unit.
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. Maintenance Frequency Checklist
Regular servicing of equipment by a qualified technician is recommended every 12 months for residential applications and
every quarter for commercial applications. Regular servicing of your unit helps in maintaining its optimum performance
and reliability. The following checklist and service periods are provided as a guide only, as some sites may require
more frequent servicing.
Electrical
Parts
Service
Frequency Detail of Service Check Service Methods
1
Mth
3
Mth
6
Mth
1
Yr
Printed Circuit
Boards Visual Inspection. Tighten Terminals as necessary on printed
circuit boards.
Electrical
Connections Check all electrical terminals,
mains, communications, etc. Re-tighten if loose.
Magnetic
Contactor Check for loose terminal
connections. Tighten electrical terminals. Remove any dust.
Indoor Unit
Parts
Service
Frequency Detail of Service Check Service Methods
1
Mth
3
Mth
6
Mth
1
Yr
Casing / Panels
and Frames Visual check for damage, rust
and dust accumulation.
For highly corrosive environment, wash panels
quarterly with water and neutral detergent
solution. Wax panels. Repair / re-paint where
required.
Insulation Visual check for insulation
conditions.
Repair / replace insulation
material.
Fan Visual check for run out of
balance and dust attached.
Clean off dust as necessary to negate possibility
of fan running out of balance.
Motor
Ω
Visual check on wiring.
Insulation resistance check to
be carried out annually.
Measure insulation resistance to earth with
Megger.
Insulation resistance should be more than 1MΩ.
Heat
Exchanger Check for clogging by dust.
Check for leaks / damage.
Clean air inlet side as necessary. Straighten any
bent fins using fins comb.
Drain Pan/
Condensation
line
Check for obstructions and free
flow of water.
Clean to eliminate obstructions/ sludge and
check condition of pan. Pour water to ensure
free flow.
Filter* Check for clogging by dust. Clean / Replace Filter.
Temperature
Readings Measure air on and air off.
Place temperature probe in return and supply
air of unit. Be careful not to touch the fan
blower whilst checking temperature with
thermometer.
*Service period for filter cleaning may vary depending on operating time and surrounding environment
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Outdoor Unit
Parts
Service
Frequency Detail of Service Check Service Methods
1
Mth
3
Mth
6
Mth
1
Yr
Casing / Panels
and Frames Visual check for damage, rust
and dust accumulation.
For highly corrosive environment, wash panels
quarterly with water and neutral detergent
solution. Wax panels. Repair / re-paint where
required.
Insulation Visual check for insulation
conditions. Repair / replace insulation material.
Fan Visual check for run out
of balance and dust
accumulation.
Clean off dust as necessary to negate possibility
of fan running out of balance.
Motor
Ω
Visual check on wiring.
Insulation resistance check to
be carried out annually.
Measure insulation resistance. Should be more
than 1MΩ.
Heat
Exchanger Check for clogging by dust.
Check for leaks / damage.
Clean air inlet side as necessary. Straighten any
bent fins using fins comb.
Condensate
Drain Line
(if available)
Check for obstructions & free
flow of water.
Clean to eliminate obstructions/ sludge and
check condition of drain line. Pour water to
ensure free flow.
Compressor
Ω
Check for high / low pressure.
Measure insulation resistance.
Check compressor for
abnormal noise/vibrations.
Measure insulation resistance. Should be more
than 1MΩ. Ensure to isolate first the VSD from
the compressor before measuring insulation
resistance.
Compressor
drive
For variable drive compressor
check full operation of drive
from minimum hertz to
maximum, check fan operation
of drive.
Check compressor amperage & running
frequency feedback from outdoor board seven
segment display.
Ensure drive fresh air
path is clear and drive fan is
operating correctly.
Check ventilation holes on top and bottom of
drive cover are clear of leaves, pebbles or dirt.
Refrigeration
Operational
Readings
Make note of operational
reading in test cool/heat mode.
Check operating pressures, record super heat
and sub-cool values.
Safety
Devices Check calibration of
safety devices.
Check resistance of sensors, pressure cut in /
cut out of pressure controls.
Faults Check for any previous fault
history on unit.
Investigate any causes for previous faults, reset
fault history.
Owner's Manual - Cascade Series 2
Doc. No. 9590-4016 Ver. 2 220616
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